/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraEmitterViewModel.h
The text format stats to only display particles count.
static const [FText](API\Runtime\Core\Internationalization\FText) StatsParticleCountFormat = FInternationalization::ForUseOnlyByLocMacroAndGraphNodeTextLiterals_CreateText(TEXT( "{0} Particles" ), TEXT( "NiagaraEmitterViewModel" ), TEXT( "StatsParticleCountFormat" ));